classVersion_2_2_0

Version_2_2_0

Extends from Modelica.Icons.ReleaseNotes.

Information

IDEAS 2.2.0 was released on June 9, 2021. The most notable changes are:

  • Interzonal airflow support has been added. See the SimInfoManager documentation for more details.
  • IBPSA has been updated to commit 443cb50b7ce58ac1585688
  • Emulator models have been added for the IBPSA project 1 WP 1.2 BOPTEST.
  • A tutorial has been added in IDEAS.Examples.Tutorial
  • Unit test results have been updated to Dymola 2020.
  • The default n50 value has been increased from 0.4 to 3 ACH.
  • The default IDEAS weather file has been changed since the old file data was shifted by one hour. The new file source is IWEC.

Detailed release notes:

  • An implementation has been added for a VAV model that has additional parameters for indicating the minimum and maximum VAV flow rate.
  • An implementation has been added for a shading controller that considers the solar irradiation on an inclined surface instead of on a horizontal surface.
  • An implementation has been added for a simple clock.
  • The number of default glazing system options has been reduced.
  • The zone Medium now equals IDEAS.Media.Air by default.
  • The implementation of ExteriorSolarAbsorption has been revised such that no initial equation is needed.
  • The orientation detection functionality has been improved for horizontal surfaces.
  • The heat of evaporation of water has been changed to a more accurate value in the internal gains model.
  • The thermostatic radiator valve implementation has been revised to avoid numerical problems.
  • Errors and warnings in various models have been improved.
  • The specific heat capacity of DryAir was wrong. This has been fixed.
  • The EmbeddedPipe model has been improved.
  • BESTEST results have been updated.
  • The glazing and frame thermal mass has been split for numerical reasons.
  • The external convection implementation of surfaces has been revised.
  • An 'inverse Perez model' has been added, which computes global and diffuse solar irradiation from 3 distinct measurements on an inclined surface.
  • The zone icon now displays the number of connected surfaces.
  • Inclination and/or azimuth angles can now be indicated using bullets (for S/E/N/W, etc) instead of manually filling in the exact value.
  • Fixed a division by zero in ThreeWayValveMotor.
  • Fixed a bug in the indirect evaporative heat exchanger that caused it to fail for balanced flow rates.
  • A tool has been added for validating a window U value according to EN673, see IDEAS/Buildings/Components/Validations/WindowEN673.mo.
  • A new boundary model has been added that internally sets the exterior air boundary conditions: OutsideAir.
  • Cleaned up old glazing records.
  • Users are now warned about missing coatings in glazing systems. The warning can be disabled.
  • Fixed an issue where dp_nominal=0 caused a division by zero in the EmbeddedPipe.
  • Fixed an issue where the TSensor output of the zone was on top of the ppm output.
  • Fixed OpenModelica import errors.
  • Revised the mixing implementation of ThreeWayValveMotor.
  • Propagated mSenFac in ThreeWayValveMotor.
  • Updates to PPD12 model.
  • Re-enabled pressure drop by default in EmbeddedPipe.
  • A reasonable default humidity has been added for the Fanger comfort model when dry air is used.
  • A bug has been fixed in the BuildingShade model that caused negative shading fractions.
  • Added an assert that verifies the correct flow direction of the EmbeddedPipe.
  • A sensible initial state, different from 0, for the CO2 concentration has been added for zones.
  • An option has been added for scaling the number of occupants input of a zone by the zone surface area.
  • The lateral displacement of horizontal fins can now be controlled instead of controlling the horizontal fin angle.
  • An inconsistency in the computation of CO2 concentrations has been fixed.
  • The impact of horizontal fin shading on the diffuse solar irradiation is modelled in more detail.

Acknowledgements:

  • We thank Ian Beausoleil-Morrison for his contribution to the exterior surface convection modelling.
  • We thank Klaas De Jonge for his contribution to the interzonal air flow implementation modelling.
  • We thank all participants of IBPSA project 1 and Michael Wetter in particular for their contributions to the IBPSA library.
  • We thank VLAIO (HBC 2018.2092), the EU (grant number 723649 - MPC-; GT) and KU Leuven (project C32/18/063) for their financial support, which made this development possible.